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7 February, 07:37

Eight times the sum of 9 and some number is 192.

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Answers (2)
  1. 7 February, 07:48
    0
    15

    Step-by-step explanation:

    To solve this, divide 192 by 8:

    192/9 = 24

    Subtract 9 from 24:

    24 - 9 = 15

    Therefore, 8 times the sum of 9 and 15 is 192
  2. 7 February, 10:51
    0
    8 times (9+x) = 192 where x = "that" certain number.

    Multiplying the left side through by 8 gives

    72+8x=192

    8x = 192-72

    8x = 120

    Since were finding 8, 8 divides the 120 giving 15

    Hence, x (that certain number) = 15.
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